/**
 * Indian Polity - Simulation Notes
 * Enhanced Mobile & Responsive Design
 * Edunivra Pvt Ltd | KalviYogi | 369 Tesla
 */

/* ========================================
   Mobile-First Base Adjustments
   ======================================== */

/* Touch-friendly sizing */
@media (hover: none) and (pointer: coarse) {
    /* Larger touch targets */
    .sidebar__link,
    .sidebar__part-header,
    .mcq-option,
    .nav-btn,
    .btn,
    .simulation-btn {
        min-height: 48px;
    }
    
    /* Better tap feedback */
    .mcq-option:active,
    .nav-btn:active,
    .btn:active,
    .simulation-btn:active {
        transform: scale(0.98);
    }
}

/* ========================================
   Tablet Breakpoint (1024px)
   ======================================== */
@media (max-width: 1024px) {
    :root {
        --sidebar-width: 260px;
        --text-5xl: 2.5rem;
        --text-4xl: 2rem;
        --text-3xl: 1.5rem;
    }
    
    .container {
        padding: 0 var(--space-4);
    }
    
    .hero {
        padding: var(--space-12) var(--space-6);
    }
    
    .hero__title {
        font-size: var(--text-4xl);
    }
    
    .features__grid,
    .infographic-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .chapters-list {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .content-section {
        padding: var(--space-6);
    }
    
    .simulation-panel {
        padding: var(--space-6);
    }
}

/* ========================================
   Mobile Breakpoint (768px)
   ======================================== */
@media (max-width: 768px) {
    :root {
        --sidebar-width: 0px;
        --header-height: 60px;
        --text-5xl: 2rem;
        --text-4xl: 1.75rem;
        --text-3xl: 1.375rem;
        --text-2xl: 1.25rem;
        --text-xl: 1.125rem;
    }
    
    html {
        font-size: 15px;
    }
    
    body {
        overflow-x: hidden;
    }
    
    /* Header Mobile */
    .header {
        left: 0;
        padding: 0 var(--space-4);
        justify-content: space-between;
        gap: var(--space-3);
    }
    
    .header__brand {
        flex: 1;
        min-width: 0; /* Allow text truncation */
    }
    
    .header__logo {
        font-size: var(--text-sm);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    .header__tagline {
        display: none;
    }
    
    .header__nav {
        display: none;
    }
    
    /* Mobile Menu Button - Right Aligned */
    .mobile-menu-btn {
        display: flex !important;
        align-items: center;
        justify-content: center;
        width: 44px;
        height: 44px;
        background: transparent;
        border: 2px solid var(--color-gold);
        border-radius: var(--radius-md);
        color: var(--color-gold);
        font-size: var(--text-xl);
        cursor: pointer;
        z-index: 300;
        flex-shrink: 0;
        margin-left: auto; /* Push to right */
    }
    
    .mobile-menu-btn:hover,
    .mobile-menu-btn:active {
        background: rgba(212, 168, 75, 0.15);
        border-color: var(--color-gold-light);
    }
    
    /* Sidebar Mobile */
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: 85%;
        max-width: 320px;
        height: 100vh;
        transform: translateX(-100%);
        transition: transform 0.3s ease-in-out;
        z-index: 250;
        box-shadow: none;
    }
    
    .sidebar.open {
        transform: translateX(0);
        box-shadow: 0 0 50px rgba(0, 0, 0, 0.5);
    }
    
    .sidebar__header {
        padding: var(--space-4);
    }
    
    .sidebar__brand {
        font-size: var(--text-xl);
    }
    
    .sidebar__link {
        padding: var(--space-4) var(--space-4);
        font-size: var(--text-base);
    }
    
    .sidebar__part-header {
        padding: var(--space-4);
        font-size: var(--text-base);
    }
    
    .sidebar__chapter {
        padding: var(--space-3) var(--space-4) var(--space-3) var(--space-8);
        font-size: var(--text-sm);
    }
    
    /* Overlay when sidebar open */
    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.7);
        z-index: 240;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }
    
    .sidebar-overlay.active {
        opacity: 1;
        visibility: visible;
    }
    
    /* Main Content Mobile */
    .main-content {
        margin-left: 0;
        padding-top: var(--header-height);
    }
    
    /* Page Header Mobile */
    .page-header {
        padding: var(--space-6) var(--space-4);
    }
    
    .page-header__title {
        font-size: var(--text-2xl);
        line-height: 1.3;
    }
    
    .page-header__breadcrumb {
        flex-wrap: wrap;
        font-size: var(--text-xs);
        gap: var(--space-1);
    }
    
    .page-header__meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-2);
    }
    
    .page-header__badge {
        font-size: 0.7rem;
        padding: var(--space-1) var(--space-3);
    }
    
    /* Hero Mobile */
    .hero {
        padding: var(--space-10) var(--space-4);
    }
    
    .hero__title {
        font-size: var(--text-3xl);
        line-height: 1.3;
    }
    
    .hero__subtitle {
        font-size: var(--text-base);
    }
    
    .hero__cta {
        flex-direction: column;
        align-items: center;
    }
    
    .hero__cta .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    /* Stats Mobile */
    .stats {
        grid-template-columns: repeat(2, 1fr);
        padding: var(--space-8) var(--space-4);
        gap: var(--space-4);
    }
    
    .stat-card {
        padding: var(--space-4);
    }
    
    .stat-card__number {
        font-size: var(--text-2xl);
    }
    
    /* Features Mobile */
    .features {
        padding: var(--space-8) var(--space-4);
    }
    
    .features__grid {
        grid-template-columns: 1fr;
    }
    
    .feature-card {
        padding: var(--space-6);
    }
    
    /* Content Sections Mobile */
    .content-section {
        padding: var(--space-5);
        margin: 0 var(--space-3) var(--space-4);
        border-radius: var(--radius-md);
    }
    
    .content-section__header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
        margin-bottom: var(--space-4);
        padding-bottom: var(--space-3);
    }
    
    .content-section__icon {
        width: 36px;
        height: 36px;
        font-size: var(--text-base);
    }
    
    .content-section__title {
        font-size: var(--text-lg);
    }
    
    /* Summary Box Mobile */
    .summary-box {
        padding: var(--space-4);
    }
    
    .summary-box__content {
        font-size: var(--text-base);
    }
    
    /* Timeline Mobile */
    .timeline {
        padding-left: var(--space-6);
    }
    
    .timeline::before {
        left: 10px;
        width: 2px;
    }
    
    .timeline__marker {
        left: -18px;
        width: 20px;
        height: 20px;
        font-size: var(--text-xs);
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--color-black);
        font-weight: 700;
    }
    
    .timeline__item {
        padding-bottom: var(--space-6);
    }
    
    .timeline__content {
        padding-left: var(--space-2);
    }
    
    .timeline__title {
        font-size: var(--text-sm);
    }
    
    .timeline__text {
        font-size: var(--text-xs);
    }
    
    /* Infographic Grid Mobile */
    .infographic-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .info-card {
        padding: var(--space-4);
    }
    
    .info-card__header {
        margin-bottom: var(--space-3);
    }
    
    .info-card__icon {
        width: 32px;
        height: 32px;
        font-size: var(--text-sm);
    }
    
    .info-card__title {
        font-size: var(--text-base);
    }
    
    /* Simulation Panel Mobile */
    .simulation-panel {
        padding: var(--space-4);
        border-radius: var(--radius-md);
        margin: 0 var(--space-3);
    }
    
    .simulation-panel::before {
        font-size: 0.6rem;
        top: var(--space-2);
        right: var(--space-2);
    }
    
    .simulation-panel__title {
        font-size: var(--text-lg);
    }
    
    .simulation-panel__controls {
        flex-direction: column;
        padding: var(--space-4);
        gap: var(--space-3);
    }
    
    .simulation-control {
        min-width: 100%;
    }
    
    .simulation-control__select {
        padding: var(--space-4);
        font-size: var(--text-base);
    }
    
    .simulation-btn {
        width: 100%;
        justify-content: center;
        padding: var(--space-4);
        font-size: var(--text-base);
    }
    
    .simulation-panel__output {
        padding: var(--space-4);
    }
    
    .simulation-placeholder {
        padding: var(--space-6);
    }
    
    .simulation-placeholder__icon {
        font-size: var(--text-3xl);
    }
    
    /* MCQ Zone Mobile */
    .mcq-section {
        padding: var(--space-4);
    }
    
    .mcq-item {
        padding: var(--space-4);
    }
    
    .mcq-item__question {
        font-size: var(--text-sm);
        display: flex;
        align-items: flex-start;
        gap: var(--space-2);
    }
    
    .mcq-item__number {
        width: 24px;
        height: 24px;
        font-size: var(--text-xs);
        flex-shrink: 0;
    }
    
    .mcq-item__options {
        gap: var(--space-2);
    }
    
    .mcq-option {
        padding: var(--space-3);
        min-height: 48px;
    }
    
    .mcq-option__label {
        width: 22px;
        height: 22px;
        font-size: var(--text-xs);
    }
    
    .mcq-option__text {
        font-size: var(--text-sm);
    }
    
    .mcq-item__answer {
        padding: var(--space-3);
    }
    
    /* Memory Box Mobile */
    .memory-box {
        padding: var(--space-5);
    }
    
    .memory-box__header {
        margin-bottom: var(--space-4);
    }
    
    .memory-box__icon {
        font-size: var(--text-xl);
    }
    
    .memory-box__title {
        font-size: var(--text-lg);
    }
    
    .memory-box__takeaway {
        padding: var(--space-3);
        margin-bottom: var(--space-4);
    }
    
    .memory-box__takeaway-text {
        font-size: var(--text-base);
    }
    
    .memory-box__point {
        padding: var(--space-2) 0;
        font-size: var(--text-xs);
    }
    
    .memory-box__point-num {
        width: 20px;
        height: 20px;
        font-size: 0.65rem;
    }
    
    /* Navigation Mobile */
    .page-navigation {
        flex-direction: column;
        gap: var(--space-4);
        padding: var(--space-5);
        margin: var(--space-6) var(--space-3);
    }
    
    .nav-btn {
        width: 100%;
        justify-content: center;
        padding: var(--space-4);
        font-size: var(--text-sm);
    }
    
    .nav-indicator {
        order: -1;
    }
    
    .nav-indicator__current {
        font-size: var(--text-xl);
    }
    
    /* Chapters Page Mobile */
    .chapters-header {
        padding: var(--space-8) var(--space-4);
    }
    
    .chapters-header__title {
        font-size: var(--text-2xl);
    }
    
    .chapters-header__subtitle {
        font-size: var(--text-base);
    }
    
    .chapters-grid {
        padding: var(--space-4);
    }
    
    .part-section {
        margin-bottom: var(--space-6);
    }
    
    .part-section__header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
        margin-bottom: var(--space-4);
        padding-bottom: var(--space-3);
    }
    
    .part-section__number {
        width: 40px;
        height: 40px;
        font-size: var(--text-lg);
    }
    
    .part-section__title {
        font-size: var(--text-xl);
    }
    
    .chapters-list {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }
    
    .chapter-card {
        padding: var(--space-4);
    }
    
    .chapter-card__title {
        font-size: var(--text-sm);
    }
    
    /* Footer Mobile */
    .footer {
        padding: var(--space-6) var(--space-4);
    }
    
    .footer__brand {
        font-size: var(--text-base);
    }
    
    .footer__text {
        font-size: var(--text-xs);
    }
    
    /* Comparison Table Mobile */
    .comparison-table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: var(--space-2) var(--space-3);
        font-size: var(--text-xs);
    }
}

/* ========================================
   Small Mobile Breakpoint (480px)
   ======================================== */
@media (max-width: 480px) {
    :root {
        --text-5xl: 1.75rem;
        --text-4xl: 1.5rem;
        --text-3xl: 1.25rem;
        --text-2xl: 1.125rem;
    }
    
    html {
        font-size: 14px;
    }
    
    .header {
        padding: 0 var(--space-3);
    }
    
    .page-header {
        padding: var(--space-4) var(--space-3);
    }
    
    .page-header__title {
        font-size: var(--text-xl);
    }
    
    .hero {
        padding: var(--space-8) var(--space-3);
    }
    
    .hero__title {
        font-size: var(--text-2xl);
    }
    
    .stats {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-2);
        padding: var(--space-6) var(--space-3);
    }
    
    .stat-card {
        padding: var(--space-3);
    }
    
    .stat-card__number {
        font-size: var(--text-xl);
    }
    
    .stat-card__label {
        font-size: var(--text-xs);
    }
    
    .content-section {
        padding: var(--space-4);
        margin: 0 var(--space-2) var(--space-3);
    }
    
    .simulation-panel {
        margin: 0 var(--space-2);
    }
    
    .page-navigation {
        margin: var(--space-4) var(--space-2);
        padding: var(--space-4);
    }
    
    /* Congrats section on page 60 */
    #congratulations {
        padding: var(--space-4) !important;
        margin: var(--space-4) var(--space-2) !important;
    }
    
    #congratulations h2 {
        font-size: var(--text-xl) !important;
    }
    
    #congratulations p {
        font-size: var(--text-sm) !important;
    }
}

/* ========================================
   Landscape Orientation Adjustments
   ======================================== */
@media (max-width: 768px) and (orientation: landscape) {
    .hero {
        padding: var(--space-6) var(--space-4);
    }
    
    .hero__title {
        font-size: var(--text-2xl);
    }
    
    .stats {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .sidebar.open {
        width: 50%;
    }
}

/* ========================================
   High DPI Display Adjustments
   ======================================== */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    /* Sharper borders */
    .sidebar,
    .header,
    .page-header,
    .content-section,
    .simulation-panel {
        border-width: 0.5px;
    }
}

/* ========================================
   Dark Mode / OLED Optimization
   ======================================== */
@media (prefers-color-scheme: dark) {
    .bg-card {
        background: #1a1a1a;
    }
}

/* ========================================
   Reduced Motion
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
    
    .sidebar {
        transition: none;
    }
}

/* ========================================
   Safe Area Insets (for notched phones)
   ======================================== */
@supports (padding: max(0px)) {
    .header {
        padding-left: max(var(--space-4), env(safe-area-inset-left));
        padding-right: max(var(--space-4), env(safe-area-inset-right));
    }
    
    .sidebar {
        padding-bottom: max(var(--space-6), env(safe-area-inset-bottom));
    }
    
    .footer {
        padding-bottom: max(var(--space-8), env(safe-area-inset-bottom));
    }
    
    .page-navigation {
        margin-bottom: max(var(--space-8), env(safe-area-inset-bottom));
    }
}

/* ========================================
   Mobile Menu Animation
   ======================================== */
.hamburger {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
}

.hamburger__line {
    width: 100%;
    height: 2px;
    background: var(--color-gold);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.mobile-menu-btn.active .hamburger__line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.mobile-menu-btn.active .hamburger__line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active .hamburger__line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ========================================
   Swipe Indicator for Mobile
   ======================================== */
.swipe-indicator {
    display: none;
    position: fixed;
    bottom: var(--space-4);
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-2) var(--space-4);
    background: rgba(212, 168, 75, 0.9);
    color: var(--color-black);
    font-size: var(--text-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    z-index: 100;
    animation: pulse 2s infinite;
}

@media (max-width: 768px) {
    .swipe-indicator {
        display: block;
    }
}

@keyframes pulse {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

/* ========================================
   Mobile Sticky Bottom Navigation
   ======================================== */
.mobile-bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-dark);
    border-top: 1px solid var(--color-gold);
    padding: var(--space-2) 0;
    z-index: 150;
    padding-bottom: max(var(--space-2), env(safe-area-inset-bottom));
}

@media (max-width: 768px) {
    .mobile-bottom-nav {
        display: flex;
        justify-content: space-around;
        align-items: center;
    }
    
    .main-content {
        padding-bottom: 70px;
    }
}

.mobile-bottom-nav__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-2) var(--space-3);
    color: var(--text-muted);
    text-decoration: none;
    font-size: var(--text-xs);
    transition: color var(--transition-fast);
}

.mobile-bottom-nav__item:hover,
.mobile-bottom-nav__item.active {
    color: var(--color-gold);
}

.mobile-bottom-nav__icon {
    font-size: var(--text-lg);
    margin-bottom: 2px;
}

/* ========================================
   Pull to Refresh Indicator
   ======================================== */
.pull-indicator {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 50%;
    transform: translateX(-50%) translateY(-100%);
    background: var(--color-gold);
    color: var(--color-black);
    padding: var(--space-2) var(--space-4);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    font-size: var(--text-xs);
    font-weight: 600;
    z-index: 50;
    transition: transform 0.3s ease;
}

/* ========================================
   Floating Action Button (Page Navigator)
   ======================================== */
.fab-navigator {
    display: none;
    position: fixed;
    bottom: 80px;
    right: var(--space-4);
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-dark) 100%);
    border-radius: 50%;
    box-shadow: var(--shadow-lg), var(--shadow-gold);
    border: none;
    cursor: pointer;
    z-index: 140;
    color: var(--color-black);
    font-size: var(--text-xl);
}

@media (max-width: 768px) {
    .fab-navigator {
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

.fab-navigator:active {
    transform: scale(0.95);
}

/* ========================================
   Grid Layout Improvements for Mobile
   ======================================== */
@media (max-width: 768px) {
    /* Fix grid that uses inline styles */
    [style*="grid-template-columns: repeat(3"] {
        grid-template-columns: 1fr !important;
    }
    
    [style*="grid-template-columns: repeat(2"] {
        grid-template-columns: 1fr !important;
    }
    
    [style*="grid-template-columns: 1fr 1fr"] {
        grid-template-columns: 1fr !important;
    }
    
    /* Better spacing for inline-styled sections */
    [style*="display: grid"] {
        gap: var(--space-4) !important;
    }
}

/* ========================================
   Scrollbar Styling for Mobile
   ======================================== */
@media (max-width: 768px) {
    ::-webkit-scrollbar {
        width: 4px;
        height: 4px;
    }
    
    ::-webkit-scrollbar-track {
        background: transparent;
    }
    
    ::-webkit-scrollbar-thumb {
        background: var(--color-gold);
        border-radius: 2px;
    }
}

/* ========================================
   Focus States for Accessibility
   ======================================== */
@media (max-width: 768px) {
    button:focus-visible,
    a:focus-visible,
    select:focus-visible,
    input:focus-visible {
        outline: 2px solid var(--color-gold);
        outline-offset: 2px;
    }
}

/* ========================================
   Loading State for Mobile
   ======================================== */
.mobile-loading {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.mobile-loading__spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(212, 168, 75, 0.2);
    border-top-color: var(--color-gold);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}